Volume 93, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Little is known about the type and longevity of the humoral response to cryptosporidial infections in developing countries. We evaluated serum antibody response to gp15 in 150 sets of maternal, preweaning and postinfection/end-of-follow-up sera from children followed up to 2 years of age to determine the influence of maternal and preweaning serological status on childhood cryptosporidiosis. Fifty two percent ( = 78) of mothers and 20% ( = 30) of children were seropositive preweaning. However, most positive preweaning samples from children were collected early in life indicating transplacental transfer and subsequent rapid waning of antibodies. Although 62% ( = 94) of children had a parasitologically confirmed cryptosporidial infection (detected by stool polymerase chain reaction) during the follow-up, only 54% ( = 51) of children were seropositive postinfection. Given there were striking differences in seropositivity depending on when the sample was collected, even though was detected in the stool of the majority of the children, this study indicates that antibodies wane rapidly. During follow-up, the acquisition or severity of cryptosporidial infections was not influenced by maternal ( = 0.331 and 0.720, respectively) as well as the preweaning serological status of the child ( = 0.076 and 0.196, respectively).

[open-access] This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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  • Received : 19 Jan 2015
  • Accepted : 22 Jun 2015
  • Published online : 04 Nov 2015

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